Guard for doubling mechanism of silk-throwing machines



y 9, 1929- H. SARFERT ET AL 1.720.447

GUARD FOR DOUBLING MECHANISM OF SILK THROWING MACHINES Filed Nov. 26, 1928 2 Sheets-Sheet l INVENTORS H/VAR'Y SF/PF'ER T. {gr/I01? E/WF/VOLD,

% fin I I ATTORNW y 1929 H. SARFERT ET AL 1.720.447 I GUARD FOR DOUBLING MECHANISM OF SILK THROWING MACHINES Filed Nov. 26, 1928 2 Sheets Sheet 2 mmvroxs MFR) Saw/ ant v V ATTORNEYS.

Patented July 9, 1929.

PATENT OFFICE.

UNITED STATES HARRY SARFERT, OF PHILADELPHIA, AND ARTHUR A. ARNOLD, OF SOUTH POllJlS- TOWN, PENNSYLVANIA.

GUARD FOR DOUBLING MECHANISM OF SILK-THROVVING MACHINES.

Application filed November 26, 1928.

Our invention relates to a new and useful guard for thread and yarn doubling unit mechanisms of sill; throwing machinery, to prevent the loose ends of said yarn or thread from becoming entangled with the pinions driving the rollers of said doubling mechanisms.

In silk throwing machinery heretofore employed, a doubling mechanism is provided which includes rollers driven by gears or pinions which mesh with a common gear on a main driving shaft, and over which a plurality of threads pass before reaching the twisting bobbins. Then the threads passing over said rollers break, the loose ends thereof tend to become entangled with the main driving shaft and with the pinions of the rollers, thus causing considerable waste of material, time and labor, in cutting and removing the twisted entangled threads and in readjusting the doubling mechanism.

To overcome this disadvantage, a shield or guard has been provided which is permanent ly and immovably fixed to the frame of the machine, and which serves to protect the main driving shaft, to prevent the entanglement of loose thread ends therewith. When however, the threads being doubled break, the particular doubling unit involved is automatically raised into an inoperative position away from said main shaft and its shield, thus leaving the still revolving pinions forming part of said doubling unit exposed. In this position, the loose ends of the threads become entangled with and twisted around said driving pinions, and result in waste of material, time and labor as above'stated.

It is therefore the object of our invention to provide each doublingunit mechanism wit-h an additional, auxiliary guard attached thereto and carried thereby, so that when said doubling unit is raised, due to the breaking of the threads being doubled, the auxiliary shield or guard of our invention is simultaneously raised, thus completely and constantly protecting the pinions of the rollers of said doubling unit and preventing the entanglement of the loose ends of said threads therewith.

It is a further object of our invention to provide a shield of this character which is simple in construction and inexpenslve to produce, and one which may be attached to doubling mechanisms now in use without any Serial No. 321,808.

change in thc'construction or operation of said mechanisms.

For the purpose of illustrating our inven tion, we have shown in the accompanying drawings two forms thereof which are at presentpreferred by us, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instriunentalities of which our invention consists can be variously arranged and organized and that our invention is not limited to the precise arrangement and organization of the instrumen talities as herein shown and described.

ljn the accompanying drawings:

Figure 1, represents a side elevation of a doubling mechanism provided with an auxiliary shield, embodying our invention.

Figure 2, represents an end view of Figure I viewed. from the right hand side, certain parts being shown in section.

Figure 3, represents a bottom plan view of Figure 1, certain parts being omitted.

Figure represents a section on line l-4 of Figure 3 Figure 5, represents a perspective view of the auxiliary shield of our invention shown detached.

Referring to the drawings, in which like referenceclutractersindicate like parts, 1 designates a doubling unit mechanism provided with a novel guard of our invention, and comprising the casing 2, composed of the up right side wall 3, rear wall t and top wall 5.

WVithin the casing 2 are secured the rollers 6 and 7-, mounted on theirshafts 8 and secured in positionby the screws 9. The rollers 6 and 7 are driven by the pinions 10, fast thereto, which mesh with the common driving gear 12, on the main driving shaft 13. The doubling unit mechanism 1 is carried by the vertical rod which passes through and is secured to the apertured boss 16 forming part of or integral with the top 5 of the casing 2, and to which it is secured by the screw 17, 19 designates a shield having an upper portion 20 extending above and protecting the shaft 13, and being secured at its lower end to the frame 21 in a permanent and rigid manner. An upper inclined roller 23 is mounted in the bearings 24 and 26 at either end of the arm which is integral with the front portion of the top 5 oil: the casing 2. The threads 25, ea 30, 31 and 32, from bobbins (not shown) pass through the guide eye 33, around the rollers'6, 7 and 23 and through the guide eye 34, to the twisting bobbin (not shown).

When the threads 28 to 32 (or any of them) break, the doubling unit 1 is automatically rod 15, into its inoperative position shown in dotted lines in Figure 2, the still revolving pinions 10 of said doubling mechanism are exposed and the loose ends of the threads 28 to 32 tend to be entangled with and twisted around said pinions, it being evident that the shield 19, permanently fixed to the frame 21 in proximity to the main shaft 13, does not in any way protector guard said pinions 10, whensaid doubling mechanism is in its raised position. c

a I It is to remedy this defectthat we have devised-thenovelshield 35, (see Fig. 5) comprising the body having the pendant vertical portion 36, cut away as at 37 to receive the shaft13, (see Fig. 2) and having the upper seats or concave portions 38 which just clear the rollers 6 and 7 (see Fig. 4). The pendant portion 36 merges into the horizontal concaved portion 40, which terminates in the upright apertured terminal lip 41, whereby said shield is secured to the boss 24 of the arm 25 by the screw 42 the concave arnrtO engages the bottom edge of the arm 25 and serves to centerthe shield 35 with respect to the rollers 6 and 7 and pinions 10, and gear 12, as will be understood from Figure 1.

The shield 35 being carried by and forming part ofthe'casing '2, completely covers and protects the pin-ions 10, when the doubling unit is in its lower operative or its raised inoperative position, thus constantly and at all times preventing the engagement of the loose ends of any ofthe threads 28-to 32 from becoming entangled with pinions 10.

It will be apparent that the front vertical pendant wall 36 is positioned and supported in advance of the pinions 10 so that under all conditions of use, there is present a wall or barrier which prevents the threads of silk or other material having access to said pinions.

It will be understood that our invention is especially adapted to Atwood silk throwing machinery, and as the mechanism for actuating or raising the rod 15 and its adjuncts is of a well known construction, we have not deemed it necessary to show or describe the same in detail. lVhile our novel guard or shield 35 is especially adapted to silk throwing machinery of the class stated, it is evident that it can be used in other situations with equal advantage, and is equally applicable to threads or yarns of various materials other than silk as is evident.

lVe are aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and we therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claim rather than to the foregoing description to indicate the scope of the invention.

Having thus described our invention, what we claim as new and desire to secure by Lelters Patent, is

In a silk throwing machine, a casing, a plurality of horizontally disposed rotatable pinions carried by said casing, a shaft arranged in parallelism with the axes of said pinions, a driving gear fixed to said shaft, said driving gear meshing with said pinions, a vertically disposed pendant guard removably supported from said casing, which guard comprises a thin flat, vertical plate,

a vertically disposed upwardly extending terminallip for attachment to said casing, a horizontally arranged arm connecting said, plate and lip and positioned between said pinions, the upper edges of said plate upon opposite sides of said horizontally disposed arm being arranged upon arcs of circles and located below said pinions and substantially the major portion of said plate being cut away toaccommodate the shaft of said driving gear, said plate being arranged wholly in advance of said pinions and said driving gear, and means for detachably securing said terminal lip to said casing.

HARRY SARFERT.

ARTHUR A. ARNOLD.

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